package factory;

import java.lang.reflect.InvocationHandler;
import java.lang.reflect.Method;
import java.time.LocalDateTime;
import java.time.format.DateTimeFormatter;

public class LoggingInvocationHander implements InvocationHandler {
    private final Object target;

    public LoggingInvocationHander(Object target) {
        this.target = target;
    }
    @Override
    public Object invoke(Object proxy, Method method, Object[] args) throws Throwable {
        Method method1=target.getClass().getMethod(method.getName());
        if (method1.isAnnotationPresent(Log.class)) {
            String methodName=method.getName();
            DateTimeFormatter formatter=DateTimeFormatter.ofPattern("yyyy-MM-dd HH:mm:ss");
            LocalDateTime startTime=LocalDateTime.now();
            System.out.println("[LOG] Method:"+methodName+"started at:"+startTime.format(formatter));
            Object result=method1.invoke(target, args);
            LocalDateTime endTime=LocalDateTime.now();
            long duration=java.time.Duration.between(startTime,endTime).toMillis();
            System.out.println("[LOG] Method:"+methodName+"ended at:"+endTime.format(formatter));
            System.out.println("[LOG] Method:"+methodName+"executed in:"+duration+"ms");
            return result;
        }else {
            return method.invoke(target, args);
        }
    }
}
